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selftests/bpf: Fix compiling parse_tcp_hdr_opt.c with musl-libc

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[ Upstream commit 4c329b99ef ]

The GNU version of 'struct tcphdr', with members 'doff' and 'urg_ptr', is
not exposed by musl headers unless _GNU_SOURCE is defined.

Add this definition to fix errors seen compiling for mips64el/musl-libc:

  parse_tcp_hdr_opt.c:18:21: error: 'struct tcphdr' has no member named 'urg_ptr'
     18 |         .pk6_v6.tcp.urg_ptr = 123,
        |                     ^~~~~~~
  parse_tcp_hdr_opt.c:19:21: error: 'struct tcphdr' has no member named 'doff'
     19 |         .pk6_v6.tcp.doff = 9, /* 16 bytes of options */
        |                     ^~~~

Fixes: cfa7b01189 ("selftests/bpf: tests for using dynptrs to parse skb and xdp buffers")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/ac5440213c242c62cb4e0d9e0a9cd5058b6a31f6.1721713597.git.tony.ambardar@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tony Ambardar 2024-07-22 22:54:38 -07:00 committed by Greg Kroah-Hartman
parent 52f5ed9461
commit 425d4934e4
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/bpf/prog_tests/parse_tcp_hdr_opt.c
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@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <test_progs.h>
#include <network_helpers.h>
#include "test_parse_tcp_hdr_opt.skel.h"